Stainless Steel Precision Weights and Weight Sets

Transcription

1 Stainless Steel Precision Weights and Weight Sets Our finest weights for your finest weighing

2 measuring up: Troemner s Calibration & Certification Laboratories have been accredited by NIST/NVLAP and its international equivalent, UKAS, since More recently, Troemner has received accreditation from NIST/NVLAP to perform density determination using a test conducted on one-piece weights. The method centers on comparing the density of unknown weight samples against the density of calibrated artifacts and producing accurate results of the density of weights. Troemner can also test for magnetic properties of weights and provide assurance that weights have extremely low magnetic permeability. Currently Troemner is seeking NIST/NVLAP magnetic susceptibility accreditation. Troemner, an ISO 9001 registered company, is the nation s leading supplier of precision weights and mass standards. We manufacture and certify weights to meet or exceed the highest tolerance standards of the National Institute of Standards & Technology (NIST), the American Society for Testing & Materials (ASTM) and the International Organization of Legal Metrology (OIML). For the most demanding calibration needs, we offer Troemner UltraClass SM precision weights with tolerances 40% to 50% better than ANSI/ASTM E617 Class 1 and equal to or exceeding OIML Class E2 standards. Our weight selection includes every imagineable size and type from 5,000 lb cast iron test weights to the extremely precise, highly polished one- and two-piece stainless steel weights. We are also the country s largest independent commercial metrology laboratory offering complete, full-time weight calibration and certification services. Troemner s staff of metrologists and calibrators is equipped with primary and secondary mass standards directly traceable to NIST as well as a full complement of the latest, finest, and most precise balances and mass comparators obtainable. Our weighing instruments and mass standards are continually maintained according to NIST Mass Measurement Assurance Program (MMAP) procedures and ISO 9001 guidelines. Four Troemner mass metrology laboratories are built to specifications recommended by the NIST-administered National Voluntary Laboratory Accreditation Program (NVLAP) and meet prescribed Accuracy Levels I and III respectively. Our Level I laboratories exceed the Environmental Cleanliness System according to FED-STD 209-E, Class 10,000 requirements. Further evidence of Troemner s high quality standards is our accreditation by both NVLAP and its internationally recognized equivalent, UKAS. We also meet the exacting requirements of GLP, GMP, FDA, Military Standard ANSI/NCSL Z540-1 and the quality assurance criteria for nuclear power plants as described in Appendix B of 10CFR50. Troemner also complies with ISO Guide (formerly ISO Guide 25). Since 1840, our business has been precision. We understand its importance to you. We are proud to offer you the weights and weight sets in this catalog our most precise weights for your most precise work. 2

3 precise weights, precisely made Every Troemner precision stainless steel weight is manufactured to meet the most exacting accuracy and appearance requirements. We start with the best stainless steel bar stock, chosen for its uniform density, high resistance to wear and corrosion and low magnetic properties. Precision & Detail We precision machine this stainless steel with the latest computer-based metalworking equipment. Even small details command great attention: Weight bottoms are slightly recessed to expose the smallest possible area to wear. Weight heads and necks are precisely shaped to give a solid, sure grip to forceps or weight lifters. We polish all surfaces to a perfect, mirror-like finish. With our one-piece weights, as little as one-quarter turn of the polishing wheel dictates a careful weighing to check our nearness to tolerance. Our weights are adjusted on the basis of apparent mass versus material of 8.0 g/cm 3 density, following the recommendations of both ANSI/ASTM E617 and OIML International Recommendation No. R111. Certificates All weights and weight sets come with a Statement of Accuracy. A variety of NISTtraceable certificates are available and are detailed on page 8 of this brochure. Troemner s Primary Standards Lab is the only dual accredited private mass laboratory in the world able to meet uncertainties at 1 / 3 the E1 tolerance giving Troemner the ability to certify weights worldwide. The laboratory houses three stateof-the-art Mettler Toledo automated mass comparators the AT10005, AT1006 and AT106H. Because there is limited activity/movement in the lab and no significant sources of heat air changes can be reduced while maintaining tight temperature control. These exceptional physical arrangements allow the mass comparators to produce some of the best measurements in the world. Weight Cases Troemner weight sets 500 grams and higher are supplied in strong cases of oak. These hand-crafted cases are fully lined with padded velvet or velour. Weight sets 200 grams and lower, as well as individual Class O and UltraClass tolerance weights, come in rugged polypropylene cases. Wood cases are available at an extra charge. Troemner s new UltraClass Weight Alloy 8 is a specially developed austenitic stainless steel for use in precision weights and mass standards. UltraClass Weight Alloy 8 possesses closely controlled density, extremely low magnetic permeability, good stability and resistance to corrosion and handling damage. Ultra Class Weight Alloy 8 has a density of 8.0 at 25 C (controlled to +/-0.1%). It is essentially non magnetic in the annealed condition. Its austenitic structure will not transform to magnetic properties under any combination of temperature and cold work down to -320 F. Ultra Class Weight Alloy 8 meets and exceeds all stainless steel material specifications that NBS (NIST) specified over 35 years ago when purchasing the original state laboratory mass standards which Troemner helped supply. 3

4 Troemner Precision Laboratory Weights AVOIRDUPOIS WEIGHT SETS 1 ANSI/ASTM E617 Class Class Class Class Weight Set 50 lb 1/32 oz lb lb lb 1/32 oz lb lb lb 1/32 oz lb lb lb 1/32 oz lb lb lb 1/32 oz lb lb lb 1/32 oz lb lb lb 1/32 oz lb lb lb 1/32 oz lb lb oz 1-32 oz lb lb TO ORDER WEIGHTS WITH CERTIFICATION: Specify the Troemner part number followed by a W for a NVLAP Weight Calibration Certificate, an NA for a UKAS Certificate of Calibration, an M for a MMAP Certificate or a T for a Traceable Certificate. See page 8 for certificate descriptions. Troemner produces both one- and two-piece precision weights. While both are manufactured to meet or exceed tolerance specifications for their class, one-piece weights should be used when the application calls for reference standards or when maximum stability is required. A precise measurement of density can only be made with one-piece standards. For calibration applications, two-piece weights should be specified. Here, where weights are subject to more wear, two-piece weights offer the advantage of being repairable and can be adjusted and refinished over time. AVOIRDUPOIS INDIVIDUAL WEIGHTS ANSI/ASTM E617 Class Class Class Class Weight 2000 lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb oz oz oz oz /2 oz /4 oz /8 oz /16 oz /32 oz /64 oz oz oz oz oz oz oz oz oz Casing for avoirdupois individual weights is available at an extra charge. 4 Troemner milligram weights from 500 mg to 1 mg are flat, with one side turned up to form a handle. Corners and edges are smooth. Each weight is embossed with its value. Larger weights are cylindrical in shape with a knob on top for easy handling.

5 CLASS O: Class O is a new ASTM designation with tolerances that are 50% of Class 1. The physical characteristics are one-piece construction containing no adjusting materials. A precise measurement of density can only be made for one-piece weights. These weights are used in a primary laboratory as reference standards. To order, simply select the appropriate set or weight catalog number in the Troemner UltraClass columns below, but add a second 0, i.e METRIC WEIGHT SETS 1 Troemner ANSI/ASTM E617 Ultra Class Class Class Class Class sm Weight Set 50 kg 1 g kg 1 mg kg 1 g kg 1 mg kg 1 g kg 1 mg kg 1 g kg 1 mg kg 1 g kg 1 mg kg 1 g kg 1 mg kg 1g kg 1mg kg- 1 g kg 1 mg kg 1 g kg 1 mg g- 1 g g- 1 mg g- 1g g- 1mg g- 1 g g- 1 mg g 1 g g 100mg g 10 g g 5 mg g 1 mg g 1 g g 100mg g 10 mg g 5 mg g 1 mg g 1 g g 100mg g 10 mg g 5 mg g 1 mg mg 10 mg mg 1 mg METRIC INDIVIDUAL WEIGHTS Troemner ANSI/ASTM E617 Ultra Class Class Class Class Class sm Weight 1000 kg kg kg kg kg kg kg kg kg kg kg kg kg kg g g g g g g g g g g g g mg mg mg mg mg mg mg mg mg mg mg mg Casing for metric individual weights is provided for 200 g and above. 1 Sets are supplied in a series unless a series is specified series means that weights beginning with a 2 are doubled in each decade and weights beginning with a 5 and a 1 are single in each decade. For example, for a set from 50g to 1g, there is one 50g, two 20g, one 5g, two 2g and one 1g series means that weights beginning with a 5, 3, 2 and 1 are single in each decade. 2 Set contains two 2 kg weights. 3 Set contains two 200g weights. ACCESSORIES Weight Lifters Forceps Chrome-plated, chamois covered lifter Wood lifter Plastic forceps, with tips contoured to fit weight necks. To Lift: To Lift: kg g or or lb L-25 1/2-1 lb L kg or 2-10 kg L-26 F-2 5

6 Precision Hook, Slotted & Special Weights Troemner offers a complete line of precision hook and slotted weights. Both types are available in all tolerance classes and a wide range of materials, including stainless steel and brass. Hook weights are supplied in three styles: Hook top, flat bottom, Hook top and bottom; Hook top and bottom, with bottom hook recessed to permit stacking or upright placement of the weights. Slotted weights are available in either flat or interlocking styles. Interlocking weights have raised areas on top and matching recessed areas on the bottom for secure, slip-free stacking. Larger weights have side indents or handles for easier lifting. Weight hangers in a variety of tolerances, capacities and materials are also available. PRECISION HOOK & SLOTTED WEIGHTS: To order, specify the Troemner catalog number, followed by a B for brass weights or an S for stainless steel weights. Also specify the ASTM or OIML adjustment tolerance class required. Weight Hook top only Hook Hook top & Bottom Hook top & bottom Bottom recessed Interlocking Slotted Flat Avoirdupois 50 lb lb lb lb lb lb lb lb lb lb oz oz oz oz /2 oz /4 oz /8 oz /16 oz /32 oz Metric 25 kg kg kg kg kg kg kg /2 kg g g g g g g g g g

7 Special and custom weights are available to meet virtually any requirement, from 50 micrograms to 5,000 kilograms and larger. We can supply weights in any size, shape, material or denomination. We can precisely adjust them to whatever tolerance class you specify. For a quotation on your custom weight needs, just fax or phone us. The variety of special and custom weights that Troemner can manufacture and calibrate to your exact specifications is almost limitless... Pennyweight and Troy weights Newton weights Grain weights Factor weights Normal sugar weights Carat weights Assay ton weights...and many, many more. ANSI / ASTM & Troemner UltraClass SM Weight Tolerances AVOIRDUPOIS Weight Ind mg Ind mg mg g & mg 1,000 lb 9.1 g 500 lb 4.5 g 100 lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb lb Troemner precision weights are of the following materials: Base Material Density Weight Range Stainless 7.84 or 8.0 g/cm 3 at 20 C 1 g and larger Steel g/cm 3 at 20 C 50 mg to 500 mg Aluminum g/cm 3 at 20 C 30 mg and smaller METRIC Weight Troemner UltraClass SM mg 0 mg 1 mg 2 mg 3 mg 4 g & mg 5 g & mg 6 g & mg 1,000 kg 20g 50g 100g 500 kg kg kg kg kg kg mg kg kg kg mg 1 5 kg mg 3 kg kg kg g g g g g g g g g g g g mg mg mg mg mg mg mg mg mg mg mg mg

8 SM Troemner UltraClass Weight Calibration & Certification Services TTroemner has long offered economical, fast and highly reliable calibration and certification services all traceable to NIST. Today, however, with mass laboratories built to specifications recommended by the NIST-administered National Voluntary Laboratory Accreditation Program (NVLAP), we provide a new, higher level of service Troemner UltraClass Calibration & Certification. These calibrations/certificates are now available: NIST/NVLAP Weight Calibration Certificate Procedures and processes used to generate this multi-page certificate, as well as its format and content, are prescribed by the National Voluntary Laboratory Accreditation Program (NVLAP). It meets all ISO, FDA, GMP, GLP, DOD, ANSI/NCSL Z540-1 and Nuclear requirements. The document contains: customer name, address, date of calibration, equipment and standards used in calibration, accuracy class, true mass value (mass in a vacuum), as found mass correction (for recalibration), as left mass corrections for each weight, uncertainty of measurement process for each weight, environmental conditions during test, construction and density of weights, calibration procedures used, statement of traceability to NIST and a helpful list of terms and definitions. NIST/NVLAP Density Certificate Troemner also performs NIST/NVLAP accredited density determinations on calibration weights using an immersed balance method pioneered by NIST scientists. Typically such tests are performed on one-piece high-precision weights in ASTM Class 0 and OIML Class E1 and E2. Troemner s Density Calibration Certificate contents are virtually identical to the foregoing Weight Calibration Certificate, covering over a dozen cogent points. UKAS Certificate of Calibration Similar to the NVLAP Certificate, this certificates content and layout, as well as the enhanced measurement processes utilized, meet the requirements of the United Kingdom Accreditation Service (UKAS). This certificate is universally accepted throughout the world. Troemner is the only UKAS-accredited U.S. mass metrology laboratory offering its customers this internationally recognized weight certification. NIST-MMAP Report of Mass Values As a participant in NIST s Mass Measurement Assurance Program (MMAP), Troemner offers a detailed statistical analysis of mass values, generated by NIST, of our measurements of customer s weights. MMAP certification follows a carefully designed calibration procedure resulting in the highest possible statistical confidence level. A NVLAP Weight Calibration Certificate is provided along with a multi-page NIST/ MMAP report the same report one receives if weights are calibrated directly by NIST. Traceable Certificate Our new, expanded Traceable Certificate includes nominal value, mass correction and tolerance for each weight in addition to the basic contents of customer name, address, purchase order number, date of calibration, accuracy class, density and statement of traceability to NIST. The Traceable Certificate measurement process uses only one series of comparisons using a single standard. Statement of Accuracy Each Troemner weight and weight set is supplied with a Statement of Accuracy which contains both date of calibration and density of each weight. It verifies that the product has been manufactured to meet all specifications for its class and has been calibrated using standards traceable to NIST. Troemner weight sets 500 grams and higher are supplied In strong cases of oak. These handcrafted cases are fully lined with padded velvet or velour. Weight sets 200 grams or lower, as well as individual Class O and UltraClass tolerance weights, come in rugged polypropylene cases. Wood cases are available at an extra charge. Participant in the National Institute of Standards & Technology Mass Measurement Assurance Program Participant in the Midwestern, Northeastern and Southeastern Measurement Assurance Programs Member, National Conference of Standards Laboratories Henry Troemner LLC 201 Wolf Drive PO Box 87 Thorofare, NJ Phone: Fax: troemner@troemner.com R E G I S T E R E D CALIBRATION CALIBRATION No Accredited by the National Voluntary Laboratory Accreditation Program for the specific scope of accreditation under Lab Code BRO (8/02)